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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A004220 a(n) = 10*log_10(n) rounded to the nearest integer.

Table of values

n a(n)
1 0
2 3
3 5
4 6
5 7
6 8
7 8
8 9
9 10
10 10
11 10
12 11
13 11
14 11
15 12
16 12
17 12
18 13
19 13
20 13
21 13
22 13
23 14
24 14
25 14
26 14
27 14
28 14
29 15
30 15
31 15
32 15
33 15
34 15
35 15
36 16
37 16
38 16
39 16
40 16
41 16
42 16
43 16
44 16
45 17
46 17
47 17
48 17
49 17
50 17
51 17
52 17
53 17
54 17
55 17
56 17
57 18
58 18
59 18
60 18
61 18
62 18
63 18
64 18
65 18
66 18
67 18
68 18
69 18
70 18
71 19

List of values

[0, 3, 5, 6, 7, 8, 8, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19]

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